Adjustment of purchase amount against TCS

My assessee filed Income Tax Return on 07/12/2022 for the A.Y.2022-2023 and simultaneously audit  report  uploaded before the Income Tax Authority on 19/11/2022.

But in the month of January, 2023. My assesssee found that Income Tax portal deducted TCS of Rs.1,56,617/- on Rs.15,66,16,575/- booked for the A.Y.2022-23.

Income Tax assessment case has been completed. Now I want to revise the accounts and the additional amount of purchase needs to be shown. How to proceed with the same. Please advise.